What fit and features does this ProJob 3101 undershirt have?

It features a close fit to the body with raglan sleeves, an extended back, and no side seams to prevent chafing.

What material is this thermal undershirt made of?

It is made of polyester with a fabric weight of 135 g/m².

Is this undershirt flame retardant or antistatic?

No, this shirt is not flame retardant, antistatic, or arc-flash rated.

What size and sleeve length does this version have?

This version comes in size L and features long sleeves with knitted cuffs.

PROJOB 3101 vest black - 643101-99-6 PROJOB 643101-99-6

Name: PROJOB 3101 vest black - 643101-99-6
Brand: PROJOB
SKU: 114627
Price: 17.95 EUR
Availability: InStock

Supplier number: PROJOB 643101-99-6 | EAN 7331622020880

17.95 tax incl.

€14.83 excl. VAT (incl. all environmental contributions)

Clothing size *

Stock is shown per size

XS On backorder S In stock M In stock L In stock XL In stock XXL In stock 3XL In stock

In stock On backorder Unavailable

On stock - immediately available

Ordered before 20:00 - delivered tomorrow 05/11/2026
Shipping costs €11.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL
Delivered from Belgium

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Projob 3101 thermal undershirt

Practical benefits

Effective thermal insulation: The 135 g/m² polyester fabric keeps you comfortably warm while efficiently managing moisture during demanding physical work.
Total friction free movement: Featuring raglan sleeves and a seamless torso construction, it protects your skin from friction while ensuring complete mobility.
Reliable extended coverage: The extended back design and knitted cuffs keep the undershirt securely in place whenever you bend or reach.

In a nutshell

The right choise for

With the Projob 3101 thermal undershirt, you stay warm and comfortable during demanding physical tasks in cold environments. The lightweight 135 g/m² polyester fabric provides efficient thermal insulation while quickly wicking moisture away from your skin to keep your body temperature balanced. Built with raglan sleeves and a seamless torso design, it eliminates friction points and delivers full freedom of movement throughout your workday. The snug fit in men's size L features an extended back and knitted cuffs, keeping this black base layer firmly in place whenever you bend or reach. An essential first layer under your workwear jacket or overalls.

Product information FAQ

€17.95

In stock - tax incl.

Key features according to our expert

Antistatic: No
Color: Black
Weight/m²: 135 g/m²
Arc flash protection: No
Colour (manufacturer): Black
Thermally insulating: Yes
High visibility: No
Flame-retardant: No
Women/Men: Men
Sleeve length: Long
Material (T-shirt): Polyester

Product description

Functional undershirt with round neck
Fits snugly to body
Raglan sleeves for greater freedom of movement
Extended back
No side seam, preventing chafing and irritation
Knitted cuff at sleeve end
Two-tone with flatlock seams in contrast color.

All Features

Antistatic: No
Color: Black
Weight/m²: 135 g/m²
Arc flash protection: No
Colour (manufacturer): Black
Thermally insulating: Yes
High visibility: No
Flame-retardant: No
Women/men: Men
Sleeve length: Long
Material (t-shirt): Polyester
Material: 100% polyester - 135 g/m2
Color comment: black-99
Sleeve: Long Sleeve
Fit: Slim
Gender: Men
Care instructions: Gentle machine wash 60 degrees;Bleach not allowed;Tumble at low temperature;Ironing. Highest temperature allowed110 degrees;Withstands no liquids stronger than perchlorethylene.
Size: L
Color code: 99
Weight: 135 g/m²
Size code: 6

Brand PROJOB
01045298
EAN 7331622020880
Supplier number PROJOB 643101-99-6

Frequently asked questions about this product

Answered by specialists

What fit and features does this ProJob 3101 undershirt have?: It features a close fit to the body with raglan sleeves, an extended back, and no side seams to prevent chafing.
What material is this thermal undershirt made of?: It is made of polyester with a fabric weight of 135 g/m².
Is this undershirt flame retardant or antistatic?: No, this shirt is not flame retardant, antistatic, or arc-flash rated.
What size and sleeve length does this version have?: This version comes in size L and features long sleeves with knitted cuffs.